To john a



(No Model.)

G. S. ROBERTS.

PLOW JOINTER.

vlaJte-nted Olot. 30, 1883.

GEORGE s. ROBERTS, OE MERED'ITH vILLAGE, NEW HAMPSHIRE, ASSIGNOR IPA'rEIvT. OFFICE.

'ro JOHN A. LANG, OE SAME rLAcE.

SPECIFICATION forming To all whom it may concern:

Be it known that I, GEORGE S. ROBERTS,

of Meredith Village, in the county of Belknap and State of New Hampshire, have invented an Improved Plow-Jointer; and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, making part of thisVv specication- Y Figure l being a side view 'of the improved plow-jointer as attached to the plow-beam; Fig. 2, a top viev of the same; Fig. 3, a front view thereof; Fig. 4, a central longitudinal vertical section'of the same, the jointer being shown in a central position under the plowbeam to show the construction clearly; Fig. 5, a view of the under Side of the plow-jointer separate.

Like letters designate corresponding parts in all of the figures.

My improved plow-jointer is especially intended for reversible plows, and the main features of the invention are improved means by which the j ointer is reversed to adapt it to reversible plows, such p lows requiring the j ointer to be reversed when the mold-board is reversed.

In the drawings, 'A represents a portion of a plow-beam, and B the stamen or standard on which the plow-jointer is mounted under the beam. This standard is secured to the beam in the position of an Ordinary colter in advance of or over the mold-board, and it may be vertical, or nearly so, as Shown. In this standard is located a yrock-shaft or oscillating rod, C, extending from above the plowbeam A down to a position for operating upon the j ointer D. This rock-shaft also is preferably vertical, though it may be somewhat inclined; A

From the lower end of the standard B a fixed pivot or axle, E, extends in a nearly horizontal direction, but preferably somewhat inclined forward, as shown, so as to be adapted to the inclined position of the jointer itself, and on this pivot swivels the j ointer, for changing its position to the right and left alternately. This nearly horizontal pivot is a most ,important feature of my invention, and renders the wholejinvention simple, eectual,

part of lLetters Patent No. 287,778, dated October 30, 1883. Application filed May 21,18%@ No niodel.)

means of constructing the j ointer and of mounting it on the pivot E. The jointer D proper is made of a single casting, with a socket, a,- in the under side, substantially as shown, to receive the forward end of the pivot E. ln addition to this,l there is a separate thimble or sleeve piece or casting, G, the sleeve part of which surrounds the pivot, and is held thereon by apin, c, inserted through the forand convenient. Y l have also an improved ward end of the pivot, as shown, or by any equivalent or s nitable means. sleeve extends an inclined seat or bolster, d, on which rests the rear end of the jointer, which is secured thereto by ascrewor bolt, f, or any equivalent means. This construction of the jointer in two parts is not only very simple and cheap, but enables the jointer to be easily and very securely mounted on the pivot E, and also enables the jointer proper to be removed and replaced by a new castingl whenever it wears out or is broken.

On the rear side of the bolster d is a slotted or grooved projection, g, in which works a finger-projection, .7, on the end of a crankarm, il, that extends forward from the rock- Above the shaft C. The oscillation of the rock-shaft to the extent of somewhat less than half a revolution by means of the said crank-arm acting in the slot of this j ointer-bolster, turns the j Ointer about one-fourth of a revolution, or sufficiently to reverse its position from right to left, and vice versa. For oscillating the rock-shaft and securing itin the two extreme positions of its movement, and thereby holding the jointer in its two reverse positions, I have shown a rod or handle, Z, secured to the upper projecting end of the rock-Shaft, yand the outer endofthisrodspringingintotwo catch-notches, m n, respectively, of a stationary catch, H, on the top of the plow-beam.V Any other suitable device for oscillating and holding the rock-shaft may be employed instead of the one herein described.

The'jointer D has a single face, p, which is alternately turned to the right and left. Fromk IOO ground. This form of the jointer is effectual to accomplish the purpose, and thereby no surface thereof suitable for one position of the jointer interferes with its action in the reverse position. a

Vhat I claim as my invention isl. A ploW-jointer, D, provided with a removable sleeve, G, constructed and adapted to receive a pivot, E, substantially as and .for the purpose herein specified.

2. The combination of the standard B, having a jointer-pivot, E, projecting therefrom, a rock-shaft, C, turning in the standard and provided with a crank-arm, fi, and a jointer, D, having a slotted projection, g, on its rear side, substantially as and for the purpose herein specified.

GEO. S. ROBERTS.

\Vitnesses:

VIRGINIA B. LADD,

S. A. L IDD. 

